Abstarct: Water is the most vital natural resource in the world, and human survival depends on the availability of water. Water scarcity is one of the greatest challenges facing human civilization in the present century, which threatens the ecosystem. Reducing water resources has made it essential for water to be used efficiently and efficiently. With increasing population growth, agricultural growth and industry growth, the use of underground and surface resources is increasing in most regions. The imbalance between supply and demand in the water sector calls for more creative management of water resources. The system dynamics can be used to water resources management. The dynamics of the system is a university degree introduced in 1960 by researchers at the Massachusetts Institute of Technology. Dynamics refers to a change over time, and if something is dynamic, it constantly changes in response to the stimuli that affect it. The simulation approach of the system relies on understanding complex interactions between elements in a system. In this method, first, variables related to water resources such as groundwater, surface water, population, etc., were identified and identified as causation and disability graphs. Then the cause and effect charts converted to the storage and flow charts in the VENSIM software, and the relationships between the variables as well as the extraction numbers of the data were put in the model and the model was implemented. The results obtained from the implementation of the model were such that without investing in the water sector in the Haraz basin in the domestic, industrial and agricultural sectors in 1410, 1429 and 1414, respectively, will be deficient in water. The proposed scenario was implemented in the model. Scenario 1 examines the conditions without any changes. The result is that in the year 1410, in the drinking water sector, the Haraz basin will suffer from a lack of domestic water. Scenario 2 examines the impact of population control on water resources in the Haraz basin, and shows that the basin of Haraz in 1420 suffers from lack of domestic water. Scenario 3 examines the use of flow-decreasing instruments, and the result is that if flood-reducing instruments are used up to 1435, the Haraz basin will not be affected by water scarcity. Scenario 4 examines the scenarios 2 and 3 at the same time, and the results show that during the 50-year period, implementation of the model in the basin will not occur.